| AD Number | 54-19-02 | Status | Active |
| Effective Date | Not specified | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | N/A |
| Product Type | ["Aircraft"] | Product Subtype | ["Rotorcraft"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Orlando Helicopter Airways, Inc. Sikorsky Aircraft Corporation |
| Model(s) | HRS-1/CH-19 HRS-3/H-19B S-55 S-55B S-55C |
54-19-02 SIKORSKY: Applies to All Model S-55 Helicopters.
Compliance required before October 1, 1954.
To insure against the loosening of the servo pilot valve locknut and subsequent improper servo operation, safety clips, Sikorsky P/N S-14-40-5194, should be installed and safetied to P/N S14-40-3227-24 lockwasher.
(Sikorsky Service Information Circular 1440-458 covers this same subject.)